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All Journal Sainteks Jurnal Periodic Jurusan Kimia UNP Jurnal Sumberdaya Hayati CHEESA: Chemical Engineering Research Articles JURNAL PENDIDIKAN TAMBUSAI Eksakta : Berkala Ilmiah Bidang MIPA Pelita Eksakta Stannum : Jurnal Sains dan Terapan Kimia SECONDARY : Jurnal Inovasi Pendidikan Menengah (JIPM) Afeksi: Jurnal Penelitian dan Evaluasi Pendidikan BIOCHEPHY: Journal of Science Education ALSYS : Jurnal Keislaman dan Ilmu Pendidikan MASALIQ: Jurnal Pendidikan dan Sains Journal of Multidisciplinary Inquiry in Science, Technology and Educational Research
Parbuntari, Hesty
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Sintesis Silikon dari Silika (SiO2) Menggunakan Metode Reduksi Hidrotermal Azzahra, Wenalda Hanifah; Beri, Deski; Aini, Syamsi; Parbuntari, Hesty
Periodic Vol 13, No 3 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i3.125787

Abstract

Silicon is one of the materials whose utilization is getting bigger along with the times. Hydrothermal reduction method is one of the methods that can be done to synthesize silicon from natural materials because silicon does not exist freely in nature. The purpose of this research is to synthesize silicon using hydrothermal reduction method. The precursor used in the reduction process is silica (SiO2). The metal used as a reductant is magnesium metal and the molten salt that can be used is AlCl3. The reduction process is carried out by varying the reduction temperature to see the degree of crystallinity of silicon formed. Silicon formed is seen at the peak of  28.44, 47.30, 56.11, 69.13 dan 76.38.
Application of aloe vera gel edible coating for Minimizing damage to tomatoes in the farming group Usaha Bersama Pemuda Solok Saiyo Sakato, Nagari Surian, Solok Regency Parbuntari, Hesty; Amelia, Kiki; Kurniawati, Desy; Mahmud, Mahmud; Martha, Rahma Dyan
Pelita Eksakta Vol 7 No 2 (2024): Pelita Eksakta, Vol. 7, No. 2
Publisher : Fakultas MIPA Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/pelitaeksakta/vol7-iss2/250

Abstract

The most common profession among Surian people is in the agricultural sector, such as tomato farmers. The farmers who are partners in PKM activities are tomato farmers in Nagari Surian, Pantai Cermin District, Solok Regency. Tomato farmers often experience losses because when the tomato harvest season arrives the product is abundant, while demand is constant. Farmers will just let the tomatoes rot because the harvesting process will take up a lot of energy and money. This activity focuses on efforts to control the quality of post-harvest tomatoes by using a coating technique based on edible natural ingredients (edible coating) with the natural ingredient aloe vera. The stages of this activity are divided into three activities, namely initial activities which include analysis of partner needs, core (providing material and practice) and final (program evaluation). Based on the results of a questionnaire given to partners as many as 20 people with an age range of 25 – 46 years and consisting of men and women, 90% of participants agreed that this edible coating could be used to solve the problem of tomatoes that rot easily after harvest.
Isolation of Flavonoid Compounds and Anti-Cholesterol Test of Dutch Teak Leaf Extract (Guazuma ulmifolia Lamk.) Parbuntari, Hesty; Yuliandari, Fadhira; Martha, Rahma Diyan
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 24 No. 03 (2023): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol23-iss03/408

Abstract

Dutch teak (Guazuma ulmifolia Lamk.) is a tree originating from Latin America (Brazil and Mexico). The results of the phytochemical test showed that Dutch teak leaves positively contained flavonoids, alkaloids (Dragendorff reagent), steroids, and saponins. The purpose of this study was to characterize the flavonoid compounds and test the anti-cholesterol properties of Dutch teak leaf extract. Flavonoid characterization methods used Mg-HCl (yellow), H2SO4 (reddish orange), NaOH (yellow), KKt-2A, UV-Vis, and FT-IR reagents. Anti-cholesterol test using the Lieberman-Burchard method. The flavonoid crystals obtained were in the form of amorphous crystals of 0.1047 grams. In KKt-2A there is a change in color from yellow to greenish yellow when viewed with a UV lamp. The UV-Vis spectrophotometer has an absorption wavelength of 326 nm. The results of FT-IR analysis showed the presence of functional groups: OH, CH, C=O, C=C, and COC. Based on these data it can be concluded that the isolated flavonoids are in the form of amorphous crystals which belong to the flavone class with the name 5,7,4' - Trihydroxyflavone-6-Prenyl. The results of the cholesterol reduction test stated that Dutch teak leaves could be anti-cholesterol as seen from the absorbance value being smaller and the percentage of anti-cholesterol activity being greater.
DEVELOPMENT OF A FIVE TIER DIAGNOSTIC TEST OF MISCONCEPTIONS ON CHEMICAL EQUILIBRIUM MATERIAL Saputra, Anwar; Parbuntari, Hesty
BIOCHEPHY: Journal of Science Education Vol. 5 No. 1 (2025)
Publisher : MO.RI Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52562/biochephy.v5i1.1466

Abstract

Misconceptions in learning chemistry have the potential to have a negative impact because of the close interrelationship of chemical materials. This study aims to develop an effective five-level diagnostic test to identify students' misconceptions in the topic of chemical equilibrium. Through the R&D approach and Rasch model. Data from validation by experts (3 chemistry lecturers and 2 high school teachers) were processed using Minifac software. Furthermore, the raw data from the pilot test on 32 students were analyzed with Ministep software. The results of the analysis showed that the research instrument had good content validity, sufficient to very good reliability (0.70-0.86), the analysis of the difficulty index showed that the questions at the first and third levels had four categories of difficulty, while at the fifth level there were three categories. The differentiated power of the questions also showed a similar pattern, with four categories in the first and third levels and three categories in the fifth level.
Efektivitas Komik Kimia sebagai Media Pembelajaran untuk Materi Elektrolit dan Non Elektrolit terhadap Hasil Belajar Peserta Didik Febrianti, Latifah Intan; Parbuntari, Hesty
Afeksi: Jurnal Penelitian dan Evaluasi Pendidikan Vol 6, No 3 (2025)
Publisher : Pusat Studi Penelitian dan Evaluasi Pembelajaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59698/afeksi.v6i3.475

Abstract

Pembelajaran kimia di tingkat SMA masih menghadapi berbagai kendala, terutama terkait topik tentang larutan elektrolit dan non elektrolit yang dianggap kompleks karena tidak tampak secara nyata. Rendahnya ketertarikan siswa dalam kegiatan belajar serta keterbatasan sarana belajar yang menarik turut menjadi faktor penghambat dalam meningkatkan pemahaman konsep. Media alternatif yang bisa dimanfaatkan sebagai upaya menangani permasalahan tersebut adalah komik kimia. Komik kimia dinilai mampu menyajikan materi secara visual dan menarik, sehingga berpotensi meningkatkan pemahaman pelajar. Kajian ini bermaksud untuk menilai seberapa efektif penggunaan komik kimia sebagai sarana pembelajaran guna mengoptimalkan prestasi belajar pelajar pada topik larutan elektrolit dan non elektrolit. Cara yang diterapkan adalah eksperimen semu dengan desain non-equivalent control group design. Cara pengumpulan subjek penelitian dilaksanakan secara purposive sampling dengan dua kelas terpilih, yaitu XI.F-10 sebagai kelas percobaan (33 peserta didik) dan XI.F-8 sebagai kelas kontrol (36 peserta didik). Instrumen penelitian berupa soal pilihan ganda sebanyak 20 butir. Data dalam kajian ini dianalisis memakai perhitungan N-Gain, pengujian awal dalam bentuk uji normalitas dan homogenitas, dan pengujian hipotesis dengan memanfaatkan independent sample t-test. Mengacu pada hasil analisis, diperoleh nilai rata-rata N-Gain pada kelompok percobaan mencapai 0,71 yang digolongkan dalam kelompok tinggi, sementara pada kelas kontrol sebesar 0,63 yang tergolong tergolong pada tingkat sedang. Hasil belajar kedua kelas memiliki distribusi normal dan bersifat homogen. Dari uji t, diperoleh nilai signifikansi sebesar 0,039 ( 0,05), yang menunjukkan adanya selisih signifikan. Oleh karena itu, ditarik kesimpulan bahwa komik kimia berkontribusi dalam meningkatkan hasil pembelajaran siswa.
Efektivitas Penggunaan LKPD Terintegrasi STEM-PjBL pada Materi Indikator Asam dan Basa Terhadap Hasil Belajar Peserta Didik Firdaus, Salsabila; Parbuntari, Hesty
Afeksi: Jurnal Penelitian dan Evaluasi Pendidikan Vol 6, No 5 (2025)
Publisher : Pusat Studi Penelitian dan Evaluasi Pembelajaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59698/afeksi.v6i5.590

Abstract

Telah tersedia LKPD terintegrasi STEM-PjBL pada materi indikator asam basa yang telah diuji validitas dan praktikalitas namun belum dilakukan uji efektivitas terhadap hasil belajar siswa. Penelitian ini bertujuan untuk menentukan efektivitas penggunaan Lembar Kerja Peserta Didik (LKPD) terintegrasi STEM-PjBL terhadap hasil belajar siswa pada materi indikator asam basa kelas XI Fase F SMAN 1 Kecamatan Guguak. Penelitian ini merupakan penelitian lanjutan yang dikembangkan oleh Syuhaibaitul Islamiah. Metode penelitian yang digunakan adalah quasi eksperimen dengan desain Nonequivalent Control Group Design. Pengumpulan data dalam penelitian ini menggunakan instrumen penelitian berupa soal pilihan ganda berjumlah 15 soal, populasi penelitian adalah kelas XI Fase F SMAN 1 Kecamatan Guguak. Teknik pengambilan sampel dilakukan secara purposive sampling yang ditentukan oleh guru. Sebagai sampel penelitian terpilih kelas XI.F-2 sebanyak 28 orang dan XI.F-3 sebanyak 32 orang. Hasil analisis data menunjukkan bahwa rata-rata N-gain kelas eksperimen sebesar 0,78 (kategori tinggi), sedangkan kelas kontrol sebesar 0,64 (kategori sedang). Selanjutnya, uji-t independen menghasilkan nilai signifikansi (2- tailed) sebesar 0,003 0,05, artinya terdapat perbedaan antara hasil belajar peserta didik pada kelas eksperimen lebih baik dibandingkan kelas kontrol. Hal ini menunjukkan penggunaan LKPD terintegrasi STEM-PjBL pada materi indikator asam basa efektif meningkatkan hasil belajar siswa.
Pengembangan Media Powerpoint Interaktif Terintegrasi Multipel Representasi Kimia pada Materi Laju Reaksi Fase F SMA/MA Annisa, Annisa; Parbuntari, Hesty
Afeksi: Jurnal Penelitian dan Evaluasi Pendidikan Vol 6, No 6 (2025)
Publisher : Pusat Studi Penelitian dan Evaluasi Pembelajaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59698/afeksi.v6i6.688

Abstract

Materi laju reaksi memiliki karakteristik yang mencakup berbagai konsep abstrak dan seringkali dianggap sulit oleh siswa sehingga menimbulkan miskonsepsi pada saat proses pembelajaran. Materi laju reaksi bersifat abstrak yang perlu dijelaskan dengan multipel representasi kimia yaitu level makroskopis, submikroskopis, dan simbolik. Salah satu upaya untuk menghindari miskonsepsi siswa pada materi laju reaksi yang bersifat abstrak adalah dengan menggunakan media pembelajaran yang terintegrasi dengan multipel representasi kimia. Media powerpoint interaktif merupakan salah satu media yang dapat memenuhi tuntutan tersebut. Penelitian ini menggunakan metode Research and Development (RD) dengan menerapkan model pengembangan 4D. Tujuan dari penelitian ini adalah menghasilkan produk berupa media powerpoint interaktif terintegrasi multipel representasi kimia pada materi laju reaksi fase F SMA/MA dan menentukan tingkat validitas dan praktikalitas dari produk yang dikembangkan. Media powerpoint interaktif divalidasi oleh 5 validator yaitu 3 orang dosen kimia FMIPA UNP dan 2 orang guru kimia SMA Negeri 1 Banuhampu. Uji praktikalitas dilaksanakan dengan 2 orang guru kimia SMA Negeri 1 Banuhampu serta 26 siswa fase F SMA Negeri 1 Banuhampu. Rumus yang digunakan untuk menganalisis tingkat validitas adalah rumus Aiken’s V dengan nilai validitas 0,91 yang dinyatakan valid dan tingkat praktikalitas guru dan siswa dianalisis dengan rumus Purwanto dengan nilai praktikalitas guru dan siswa berturut-turut 96% dan 90% yang dikategorikan sangat praktis.
PENGEMBANGAN E-MODUL FAKTOR-FAKTOR YANG MEMPENGARUHI LAJU REAKSI BERBASIS PROJECT BASED LEARNING UNTUK MENINGKATKAN KEMAMPUAN BERPIKIR KREATIF PESERTA DIDIK Husna, Miftahul; Parbuntari, Hesty
SECONDARY: Jurnal Inovasi Pendidikan Menengah Vol. 5 No. 3 (2025)
Publisher : Pusat Pengembangan Pendidikan dan Penelitian Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51878/secondary.v5i3.6119

Abstract

ABSTRACT This study aims to develop an e-module on the factors affecting reaction rates based on project-based learning to enhance students’ creative thinking skills, as well as to determine its validity and practicality. The research employs Educational Design Research (EDR) using the Plomp development model. The stages of Plomp’s development model begin with preliminary research conducted through the distribution of student questionnaires and teacher interview sheets. The prototyping phase  was carried out using instruments such as self-evaluation questionnaires, individual evaluations, as well as validity and practicality assessments. The final stage of this model is the assessment phase. This study is limited to the prototyping phase, focusing on testing validity and practicality. Data collection was carried out using individual evaluation questionnaires, validity questionnaires, and practicality questionnaires. Validation was conducted by five validators, consisting of three chemistry lecturers from the Faculty of Mathematics and Natural Sciences at UNP and two high school chemistry teachers from SMA Pembangunan Laboratorium UNP. Meanwhile, practicality testing involved two chemistry teachers and nine Phase F students from Grade XI at SMA Pembangunan Laboratorium UNP. The data analysis technique used Aiken’s V formula for validity and the Likert scale formula for practicality. The validity test results showed a score of 0.92, categorized as valid. The practicality test results showed a score of 93% by teachers and 90% by students, both categorized as highly practical. Therefore, the project-based learning e-module on factors affecting reaction rates, designed to enhance the creative thinking skills of Phase F students in Grade XI of SMA/MA, is considered valid and practical. ABSTRAK Penelitian ini bertujuan untuk menghasilkan e-modul faktor-faktor yang mempengaruhi laju reaksi berbasis project based learning untuk meningkatkan kemampuan berpikir kreatif peserta didik serta mengetahui kevalidan dan tingkat kepraktisannya. Jenis penelitian ini adalah Educational Design Research (EDR) yang menggunakan model pengembangan Plomp. Tahapan model pengembangan Plomp yaitu penelitian awal (preliminary research) yang dilakukan dengan penyebaran angket peserta didik serta lembar wawancara guru. Tahap pembentukan prototipe (prototyping phase) yang dilakukan dengan instrumen angket self evaluation, evaluasi perorangan, validitas dan praktikalitas. Tahapan terakhir dari model ini yaitu tahapan penilaian (assessment phase). Penelitian ini dibatasi hingga tahap pembentukan prototipe dengan pengujian validitas dan praktikalitas. Pengumpulan data dilakukan dengan menggunakan angket evaluasi perorangan, angket validitas dan angket praktikalitas. Validasi dilakukan oleh lima orang validator yaitu tiga orang dosen kimia FMIPA UNP dan dua orang guru kimia SMA Pembangunan Laboratorium UNP. Sementara itu praktikalitas dilakukan oleh dua orang guru kimia dan sembilan orang peserta didik Fase F kelas XI SMA Pembangunan Laboratorium UNP. Teknik analisis data menggunakan formula Aiken’s V dan praktikalitas menggunakan formula Likert. Hasil uji validitas memiliki nilai sebesar 0,92 dengan kategori valid dan untuk hasil uji kepraktisan oleh guru memperoleh nilai sebesar 93% dengan kategori sangat praktis dan oleh siswa sebesar 90% dengan kategori sangat praktis. Oleh karena itu, e-modul faktor-faktor yang mempengaruhi laju reaksi berbasis project based learning untuk meningkatkan kemampuan berpikir kreatif peserta didik fase F kelas XI SMA/MA dinyatakan valid dan praktis.
Pengaruh Metode Ekstraksi Maceration Vortex Technique terhadap Total Flavonoid Content dari Daun Meniran (Phyllanthus niruri L.) Rahmi, Miftahul; Parbuntari, Hesty
MASALIQ Vol 5 No 4 (2025): JULI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i4.6826

Abstract

Phyllanthus niruri L., a medicinal plant from the Phyllanthaceae family, is widely recognized in traditional medicine for its flavonoid content in the leaves, which functions as a natural antioxidant protecting cells from damage caused by free radicals. This study aims to investigate the effect of the Maceration Vortex Technique (MVT) on the total flavonoid content of Phyllanthus niruri leaves. The method involved a 2-hour maceration process followed by 5 minutes of vortexing using 70% ethanol as the solvent. Total flavonoid content was analyzed using UV-Vis spectrophotometry at a maximum wavelength of 431 nm. The results demonstrated that the MVT method yielded a high flavonoid content, indicating the technique's effectiveness in extracting flavonoid compounds from Phyllanthus niruri leaves. The study concludes that MVT is a promising alternative extraction method that is efficient, simple, and applicable for obtaining bioactive compounds from natural sources. These findings have positive implications for the development of antioxidant-rich herbal products derived from natural ingredients.
Pengaruh Metode Ekstraksi Sonikasi terhadap Total Flavonoid Content dari Daun Pare (Momordica charantia L.) Octaviana, Nur; Parbuntari, Hesty
MASALIQ Vol 5 No 6 (2025): NOVEMBER
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i6.7822

Abstract

The use of medicinal plants in Indonesia is still largely based on traditional knowledge passed down through generations, often lacking sufficient scientific validation. Momordica charantia L., a plant from the Cucurbitaceae family, is widely recognized in traditional medicine for its flavonoid content found in the leaves, which exhibits antioxidant, antidiabetic, antirheumatic, and antimicrobial properties. This study aims to determine the effect of sonication on the total flavonoid content of pare (bitter melon) leaves. Extraction was carried out using a sonicator for 60 minutes at 40 °C, with a power of 50 W and a frequency of 40 kHz. The filtrate obtained from the filtration process was then evaporated using a rotary evaporator with 70% ethanol as the solvent. The total flavonoid content was determined using a UV-Vis spectrophotometer at a maximum wavelength of 431 nm. The results showed that the sonication method produced a total flavonoid content of 159.42 mg QE/g, which is considered high. These findings indicate that sonication is a fast, efficient, and environmentally friendly extraction method for obtaining flavonoid compounds from Momordica charantia leaves. This study contributes scientifically to the development of modern green technology-based extraction methods for the utilization of local medicinal plants.
Co-Authors Aini, Syamsi Alizar, Alizar Annisa Annisa Asnah, Nur Azura, Nur Azzahra, Wenalda Hanifah Budhi Oktavia Danar Danar Danar, Danar Deski Beri Desy Kurniawati Erwan, Meriska Octavia Fajri, Ayu Insa fatimah Fatimah Febri Perdana, Keke Febrianti, Latifah Intan Firdaus, Salsabila Fitri Amelia Husna, Miftahul Ifan Rivaldo Illahi, Annisa Ridho Iryani Iryani Iswendi iswendi Kholifah, Siti Nurriyatul Kiki Amelia, Kiki Lestari, Nasa Bela Dwi Mahmud Mahmud Maida, Margarita Claudya Martha, Rahma Dyan Maulidina, Freshilla Megawati - Miftahul Rahmi, Miftahul Muadifah, Afidatul Octaviana, Nur Putri, Reza Athia Rahma Diyan Martha Safitri, Yunita Diyah Saputra, Anwar Suryani, Okta Winnugroho Wiratman, Manfaluthy Hakim, Tiara Aninditha, Aru W. Sudoyo, Joedo Prihartono Yuliandari, Fadhira Yulistia, Siska